Ha ha. I’m XNFP, yet I’m extroverted in the main.
It seems to me that there are environmental factors in extroversion/introversion; which is to suggest a degree of isolation may pull a person toward the introspective pole. A short version of the Big Five may be taken online.
Tried this knock-off from HRDPress. This result seems accurate except, as it is with the capture provided by type/style assessments, the frozen perspective has the potential to induce an interpretive attribution error. Well, it can’t do so with me because I know better! My main gripe with the field of assessment, and it’s a field I’m in, is that assessment results and interpretations many times are plugged into coaching (etc.,) contexts in which ‘folk psychological’ misconceptions may rule.